用于逆半色调处理的查找表（LUT）方法。

Look-up table (LUT) method for inverse halftoning.

作者信息

Mese M, Vaidyanathan P P

机构信息

Dept. of Electr. Eng., California Inst. of Technol., Pasadena, CA 91125, USA.

出版信息

IEEE Trans Image Process. 2001;10(10):1566-78. doi: 10.1109/83.951541.

DOI:10.1109/83.951541

PMID:18255499

Abstract

In this paper we propose look-up table (LUT) based methods for inverse halftoning of images. The LUT for inverse halftoning is obtained from the histogram gathered from a few sample halftone images and corresponding original images. The method is extremely fast (no filtering is required) and the PSNR and visual image quality achieved is comparable to the best methods known for inverse halftoning. The LUT inverse halftoning method does not depend on the specific properties of the halftoning method, and can be applied to any halftoning method. Then, an algorithm for template selection for LUT inverse halftoning is introduced. We demonstrate the performance of the LUT inverse halftoning algorithm on error diffused images and ordered dithered images. We also extend LUT inverse halftoning to color halftones.

摘要

在本文中，我们提出了基于查找表（LUT）的图像逆半色调处理方法。用于逆半色调处理的查找表是从几个样本半色调图像和相应的原始图像收集的直方图中获得的。该方法速度极快（无需滤波），并且实现的峰值信噪比（PSNR）和视觉图像质量与已知的最佳逆半色调处理方法相当。查找表逆半色调处理方法不依赖于半色调处理方法的特定属性，并且可以应用于任何半色调处理方法。然后，介绍了一种用于查找表逆半色调处理的模板选择算法。我们展示了查找表逆半色调处理算法在误差扩散图像和有序抖动图像上的性能。我们还将查找表逆半色调处理扩展到彩色半色调。